гравитация при нажатии на кнопку

#include <amxmodx>
#include <fakemeta>

#define PLUGIN "Gravity"
#define VERSION "0.1"
#define AUTHOR "Stimul"

#define GRAVITY 0.5
#define SERVER_GRAVITY 1.0

new g_ChWeap[33] = { false, ... }

public plugin_init()
{
        register_plugin("PLUGIN", "VERSION", "AUTHOR")
        register_event("CurWeapon", "WeaponChange", "be", "1=1")
        register_clcmd("+gravity", "ClCmdGravityOn")
        register_clcmd("-gravity", "ClCmdGravityOff")
}

public ClCmdGravityOn(id)
{
        set_pev(id, pev_gravity, GRAVITY)
        g_ChWeap[id] = true
}

public ClCmdGravityOff(id)
{
        set_pev(id, pev_gravity, SERVER_GRAVITY)
        g_ChWeap[id] = false
}

public WeaponChange(id)
{
        if(g_ChWeap[id])
                set_pev(id, pev_gravity, GRAVITY)
}